Providing instruments that detect, measure, analyze, and control your process and your facility.

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At Lesman, every one of our employee-owners stands behind the products we sell and the service we provide. We strive for 100% error-free order entry, error-free shipping, and 100% satisfaction guaranteed at all times. If you're not satisfied with the products you buy from Lesman or the services we provide along the way, we'll work with you to achieve that goal.

Since 1962, Lesman has been a trusted representative and stocking distributor for process control and measurement instrumentation in Illinois, Indiana, Wisconsin, Missouri, Iowa, and Michigan's upper peninsula.

Exclusive representative for Siemens, ASCO Valve, Honeywell, DeZurik|APCO|Hilton, United Electric, WIKA, Baker Hughes GE, Jordan Valves and more.
Sales team with an average 16 years process instrumentation experience, including degreed mechanical, chemical, and industrial engineers.
"No Registration Required" access to free online training, user manuals, and technical tips. See our training center for more than 40 hours of free videos.

Whatever your goal — reducing energy costs and waste, better inventory management, reducing downtime and maintenance costs, improving product quality, managing worker and plant safety — the staff at Lesman will help you get the most value out of your process measurement and control instruments.